What should I select in the print postage page if I want to ship a box via USPS priority shipping?

[sunny237]

I want to ship a box that's 2 lbs, 4 ounce. Dimensions are 13" x 11" x 5". 

Should I select Large Package or Package/Thick Envelope? 

[nobody*s_perfect]

Package/thick envelope

[dougsue123b]

Anything over 12 inches is a large package.

that extra inch is going to cost you too.

[sam9876]

"Anything over 12 inches is a large package.

that extra inch is going to cost you too."

False.

[lintbrush*]

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@dougsue123b wrote:

Anything over 12 inches is a large package.

that extra inch is going to cost you too.

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Anything over 1 cu foot is considered a large package.  That is possible if one of the measurements is over 12", but isn't always the case.

LxWxH = cu. in

1,728 cu in = 1 cu ft

13x11x5 = 715 (less than 1/2 cu ft)

12x12x12 is one cu ft.  As I don't feel like doing multiplication all the time, if all 3 don't add up to 36, there's no way it'll be over a cu ft.  (But it doesn't always mean that if it is more than 36, it'll be over 1 cu ft. either.)

[nobody*s_perfect]

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@lintbrush* wrote:

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@dougsue123b wrote:

Anything over 12 inches is a large package.

that extra inch is going to cost you too.

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Anything over 1 cu foot is considered a large package. ...

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No, a side over 12 inches doesn't mean that USPS considers the package to be "large."

If the package volume  is over 1 cubic foot, then it will incur the dreaded 'dimensional weight" IF it is being sent via Priority Mail to Zones 5 - 9.

If the length-plus-girth is over 84 inches, then it will incur the "balloon" rate if it's Priority and going to Zones 1 - 4, or via Parcel Select or Retail Ground to any Zone.

The shipping calculator at usps.com asks if any dimension is over 12 inches, but that's because (as you mentioned) if all dimensions are 12 inches or less, it's not possible for the package to fall into one of those surcharge categories.